CN112646590B - Coke oven positive pressure oven drying process - Google Patents

Coke oven positive pressure oven drying process Download PDF

Info

Publication number
CN112646590B
CN112646590B CN202011532670.XA CN202011532670A CN112646590B CN 112646590 B CN112646590 B CN 112646590B CN 202011532670 A CN202011532670 A CN 202011532670A CN 112646590 B CN112646590 B CN 112646590B
Authority
CN
China
Prior art keywords
oven
alpha
coke oven
positive pressure
coke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011532670.XA
Other languages
Chinese (zh)
Other versions
CN112646590A (en
Inventor
张熠
王晓东
王常海
马兴翼
吴添
张雷
刘超
刘瑞峰
何鸥
李申明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Acre Automation Co ltd Mcc
Acre Coking and Refractory Engineering Consulting Corp MCC
Original Assignee
Acre Automation Co ltd Mcc
Acre Coking and Refractory Engineering Consulting Corp MCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Acre Automation Co ltd Mcc, Acre Coking and Refractory Engineering Consulting Corp MCC filed Critical Acre Automation Co ltd Mcc
Priority to CN202011532670.XA priority Critical patent/CN112646590B/en
Publication of CN112646590A publication Critical patent/CN112646590A/en
Priority to PCT/CN2021/140566 priority patent/WO2022135491A1/en
Application granted granted Critical
Publication of CN112646590B publication Critical patent/CN112646590B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B21/00—Heating of coke ovens with combustible gases
    • C10B21/10—Regulating and controlling the combustion

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)

Abstract

The invention relates to the technical field of coke oven drying, in particular to a positive pressure oven drying process for a coke oven. 1) The maximum content of 0.035-0.05% is adoptedCalculating the day of heating by the daily expansion rate, and drawing a heating curve of the coke oven; 2) each coke oven is only provided with a pipeline on one side, and each two burners share one set of positive pressure oven equipment, namely, each two carbonization chambers only use one set of positive pressure oven equipment; 3) controlling the pressure of the carbonization chamber to be 50-300 Pa; 4) setting air coefficient alpha values of different temperature intervals, and calculating actual air coefficient alpha through the measurement result of the on-line waste gas analysis instrument1(ii) a 5) Setting air coefficient alpha values (2-40) in different temperature ranges to enable the actual value alpha of the air coefficient1And kept in the set alpha range; 6) and finishing the oven drying process after the temperature of the coke oven reaches the required temperature. The method can obviously reduce the cost of oven drying equipment, shorten the oven drying days, improve the tightness of the oven body, better realize the source decrement control of the coke oven pollutants and prolong the expected service life of the coke oven.

Description

Coke oven positive pressure oven drying process
Technical Field
The invention relates to the technical field of coke oven drying, in particular to a positive pressure oven drying process for a coke oven.
Background
The coke oven baking is an operation process for heating the coke oven from normal temperature to normal heating (or coal charging), and the process is very important and complex, and has a vital influence on the service life of the coke oven. The existing coke oven drying method can be divided into a negative pressure drying oven and a positive pressure drying oven. The main driving force of air and waste gas after combustion during negative pressure oven drying comes from the suction force of a chimney, and the main driving force of air and waste gas after combustion during positive pressure oven drying of the coke oven mainly comes from a fan. The positive pressure oven of the coke oven can ensure that the whole oven keeps positive pressure in the whole oven drying process, and the process is more scientific and is more and more accepted by the market.
However, the prior positive pressure oven technology has the defects of complex equipment, high cost, incomplete automatic control degree, inaccurate control of some important process parameters in the oven process and the like.
The prior positive pressure oven technology has the following defects:
1) in the prior positive-pressure oven process, oven burners are required to be simultaneously inserted into two sides of machine coke in a carbonization chamber, and each burner is provided with a set of positive-pressure oven equipment (for conveying gas and air), which means that two sets of oven equipment are required to be arranged in each hole of the carbonization chamber, and oven pipelines and oven equipment are required to be arranged on the coke side of a coke oven machine at the same time;
2) the automatic control degree of the prior positive pressure oven technology is relatively lagged behind, the automatic adjustment of the oven gas quantity can be realized at most according to the set temperature rising curve, and the automatic control of the air quantity required by the gas combustion cannot be realized;
3) in the prior positive pressure oven drying process, only the pressure of the carbonization chamber is monitored in the oven drying process, the numerical value of the pressure of the carbonization chamber is not controlled, and the pressure distribution in the oven during the oven drying period is not consistent with the pressure in the carbonization chamber during the actual production of the coke oven;
4) when a temperature rise curve is set in the conventional positive-pressure furnace drying process, the method of the negative-pressure furnace drying process is basically continued, and the maximum daily expansion rate of 0.03-0.035% is generally adopted for calculation, so that the corresponding furnace drying days are more.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a positive-pressure oven drying process for a coke oven, which can obviously reduce the cost of oven drying equipment, shorten the oven drying days, improve the tightness of an oven body, better realize the reduction control of the pollutant source of the coke oven and prolong the expected service life of the coke oven.
In order to achieve the purpose, the invention adopts the following technical scheme:
a positive-pressure oven drying process for a coke oven specifically comprises the following steps:
1) calculating the number of heating days by adopting the maximum daily expansion rate of 0.04 percent, calculating and determining the actual number of heating days by dividing the expansion amount of each temperature interval of the silica bricks by the determined maximum daily expansion rate, drawing a heating curve of the coke oven, and compiling a baking scheme according to the heating curve;
2) arranging an oven drying pipeline on one side of the coke oven, connecting the oven drying gas pipeline with gas inlets of all positive pressure oven drying equipment, connecting gas and air outlets of the positive pressure oven drying equipment with a burner, and inserting the burner into a carbonization chamber to complete the installation of the oven drying pipeline and the equipment;
each coke oven is only provided with a pipeline on one side (machine side or coke side), each carbonization chamber is also only provided with a combustor inserted into one side of the pipeline, and each two combustors share one set of positive pressure oven equipment, namely each two carbonization chambers only use one set of positive pressure oven equipment.
The positive pressure oven equipment comprises an electromechanical integrated fuel gas supply device and an air supply device, wherein the air supply device is provided with a variable frequency fan; designing and constructing the baking furnace pipeline and installing equipment according to the ideas;
3) when the coke oven starts to be dried, air and gas are fed into a burner for combustion through an electromechanical integrated gas supply device and an air supply device, hot gas is continuously blown into a carbonization chamber, so that the whole oven keeps positive pressure in the whole oven drying process, and meanwhile, the pressure of the carbonization chamber is controlled to be 50-300 Pa by controlling a flue turning plate and a waste gas shutter turning plate;
4) setting air coefficient alpha values of different temperature intervals, arranging an online waste gas analysis instrument at the coke oven flue of the coke oven, and calculating the actual air coefficient alpha according to the measurement result of the online waste gas analysis instrument1，
α1＝1+0.43×(O2-0.5CO)/(CO2+CO)；
In the formula:
α 1 is the actual air coefficient;
O2is the oxygen content in percentage by mass;
CO is the content of carbon monoxide in percentage by weight;
CO2is the mass percentage content of carbon dioxide;
5) setting air coefficient alpha values (2-40) in different temperature ranges, and comparing actual values alpha of the air coefficients on line1The difference value between the set value alpha and the set value alpha is used for automatically adjusting the fan frequency through a PID algorithm, and when alpha is equal to alpha1When the frequency is larger than alpha, the frequency of the fan is reduced, and when the frequency is larger than alpha1When the air flow rate is less than alpha, the frequency of the fan is improved, so that the actual value alpha of the air coefficient1And kept in the set alpha range; the air quantity in the oven drying process is automatically adjusted, and the reasonable proportion of the temperature of the coke oven in the height direction is ensured.
6) And finishing the oven drying process after the temperature of the coke oven reaches the required temperature.
Compared with the prior art, the invention has the beneficial effects that:
1) the coke oven has the advantages that oven drying pipelines are arranged on one side (machine side or coke side) of the coke oven, every two carbonization chambers share one set of positive pressure oven equipment (mechatronic fuel gas supply device and air supply device), compared with the existing positive pressure oven process, two sets of positive pressure oven equipment are needed for each carbonization chamber, the cost is greatly saved, and the side, on which the pipelines are not laid, can be used for carrying out work such as vehicle debugging and the like during oven drying, so that the preparation work before the production of other coke ovens is conveniently carried out;
2) in the baking process, the pressure of the carbonization chamber is controlled to be 50-300 Pa by controlling a flue turning plate of the coke oven and a waste gas shutter turning plate, so that the pressure distribution in the oven in the baking process is consistent with the production, the tightness of the oven body is ensured, and the baking quality is improved;
3) the measurement result of the online waste gas analysis instrument is compared with the set air coefficient, and the air distribution quantity is automatically adjusted, so that the proportion control of the coke oven in the height direction temperature is more accurate, the oven drying quality is improved, the air quantity of a fan is reduced, and the energy consumption is greatly reduced;
4) as a more reasonable pressure value of the carbonization chamber is set and a more advanced air distribution quantity automatic adjustment process is used, the defects of the traditional negative pressure oven drying process are thoroughly overcome, and the expansion of the coke oven is more uniform during the oven drying, the maximum daily expansion rate of 0.04 percent can be adopted to calculate a temperature rise curve, and the oven drying time of the coke oven can be shortened by about 7-10 days.
Drawings
FIG. 1 is a temperature rise graph of a coke oven according to the present invention;
FIG. 2 is a schematic view of an oven duct of the present invention disposed on the coke side of a coke oven;
FIG. 3 is a schematic view of a carbonization chamber of the present invention sharing a set of positive pressure oven equipment.
In the figure: 1-coke side 2-oven pipeline 3-machine side 4-positive pressure oven equipment 5-carbonization chamber
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
example (b):
a coke oven positive pressure oven drying process, a coke oven drying process with positive pressure of a carbonization chamber, comprises the following steps:
1) as shown in the attached figure 1, after the expansion data of the coke oven silica brick sample is obtained, the expansion amount of each temperature interval of the silica brick is divided by the determined maximum daily expansion rate to calculate and determine the actual heating days, the maximum daily expansion rate of 0.04% is adopted to calculate the heating days to be 56 days, the abscissa is the heating days, the ordinate is the temperature, a heating curve of the coke oven is drawn, and an oven scheme is compiled according to the heating curve.
2) As shown in FIG. 2, when designing the drawing of oven duct, one side of the coke oven is coke side 1, the other side is machine side 3, and oven duct 2 is arranged on coke side 1 of the coke oven.
As shown in FIG. 3, one set of positive pressure oven apparatus 4 is used for every two carbonization chambers 5. The positive pressure oven equipment 4 comprises an electromechanical integrated fuel gas supply device and an air supply device, and the air supply device is provided with a variable frequency fan.
3) After the coke oven starts to be dried, air and gas are fed into a combustor for combustion through an electromechanical integrated gas supply device and an air supply device of the positive pressure oven device 4.
And continuously blowing hot gas into the carbonization chamber to keep the whole oven at positive pressure in the whole oven drying process, and controlling the pressure of the carbonization chamber to be 50-300 Pa by controlling the flue turning plate and the waste gas shutter turning plate of the coke oven.
4) The values of the air coefficient alpha set for different temperature intervals are shown in table 1,
TABLE 1 air coefficient values for different temperature ranges
Temperature interval (. degree.C.) Less than 50 50～100 100～200 200～300 300～500 500～700 Above 700
Air factor alpha 30～40 20～30 15～20 10～15 5～10 3～5 2～3
At the same time, the coke oven is arranged at the flue of the coke ovenThe on-line waste gas analyzer measures the oxygen content, carbon monoxide content and carbon dioxide content in percentage by mass on line, and calculates the actual air coefficient alpha according to the measurement result of the on-line waste gas analyzer in the oven drying process1，
α1＝1+0.43×(O2-0.5CO)/(CO2+CO)；
In the formula:
α 1 is the actual air coefficient;
O2is the oxygen content in percentage by mass;
CO is the content of carbon monoxide in percentage by weight;
CO2is the mass percentage content of carbon dioxide;
5) on-line comparison of the actual value alpha of the air coefficient1The difference value of the frequency of the fan and a set value alpha is automatically adjusted through a PID algorithm, and when the frequency of the fan is alpha1When the frequency is larger than alpha, the frequency of the fan is reduced, and when the frequency is larger than alpha1When the air flow rate is less than alpha, the frequency of the fan is improved, so that the actual value alpha of the air coefficient1And kept in the set alpha range; the air quantity in the oven drying process is automatically adjusted, the required air quantity is accurately supplied, and the reasonable proportion of the coke oven height to temperature is ensured.
6) When the straight-moving temperature of the coke oven reaches 800 ℃, the coke oven is heated in the basement, oven drying equipment and pipelines are dismantled, and the oven drying process is finished.
According to the invention, oven drying pipelines can be arranged on one side (the machine side 3 or the coke side 2) of the coke oven, every two carbonization chambers 5 share one set of positive pressure oven equipment 4 (a mechatronic gas supply device and an air supply device), compared with the existing positive pressure oven process, two sets of positive pressure oven equipment are needed for each carbonization chamber, the cost is greatly saved, and the side, on which the pipelines are not laid, can be used for carrying out work such as vehicle debugging and the like during oven drying, so that the preparation work before other coke ovens are produced is conveniently carried out; in the baking process, the pressure of the carbonization chamber is controlled to be 50-300 Pa by controlling a flue turning plate of the coke oven and a waste gas shutter turning plate, so that the pressure distribution in the oven in the baking process is consistent with the production, the tightness of the oven body is ensured, and the baking quality is improved; the measurement result of the on-line waste gas analysis instrument is compared with the set air coefficient, and the air distribution quantity is automatically adjusted, so that the proportional control of the coke oven temperature in the height direction is more accurate, the oven drying quality is improved, the air quantity of a fan is reduced, and the energy consumption is greatly reduced; as more reasonable pressure value of the carbonization chamber is set and more advanced automatic air distribution quantity adjusting process is used, the defects of the traditional negative pressure oven drying process are thoroughly overcome, and the expansion of the coke oven is more uniform during oven drying, the maximum daily expansion rate of 0.04 percent can be adopted to calculate the temperature rise curve, and the oven drying time of the coke oven can be shortened by about 7-10 days.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (5)

1. A positive-pressure oven drying process of a coke oven is characterized by comprising the following steps:
1) calculating the number of days for heating by adopting a maximum daily expansion rate of 0.035-0.05%, calculating and determining the actual number of days for heating by dividing the expansion amount of each temperature interval of the silica bricks by the determined maximum daily expansion rate, drawing a heating curve of a coke oven and compiling a heating scheme according to the heating curve;
2) arranging oven pipelines on one side of the coke oven, connecting the oven gas pipelines with gas inlets of all positive pressure oven equipment, connecting gas and air outlets of the positive pressure oven equipment with a burner, and inserting the burner into a carbonization chamber to complete the installation of the oven pipelines and the equipment;
each coke oven is only provided with a pipeline on one side, each carbonization chamber is also only provided with a combustor inserted into one side of the pipeline, and each two combustors share one set of positive pressure oven equipment, namely each two carbonization chambers only use one set of positive pressure oven equipment;
3) when the coke oven starts to be baked, the positive pressure baking oven equipment sends air and fuel gas into the combustor for combustion, and continuously blows hot gas into the carbonization chamber, so that the whole oven keeps positive pressure in the whole baking oven process; the pressure of the coking chamber is controlled by controlling a flue turning plate and a waste gas shutter turning plate of the coke oven; controlling the pressure of the carbonization chamber at 50-300 Pa;
4) setting air coefficient alpha values of different temperature intervals, arranging an online waste gas analysis instrument at the flue of the coke oven, and calculating the actual air coefficient alpha according to the measurement result of the online waste gas analysis instrument as shown in the following formula1，
α1＝1+0.43×(O2﹣0.5CO)/(CO2+CO)；
In the formula:
α1is the actual air factor;
O2is the oxygen content in percentage by mass;
CO is the carbon monoxide content in percentage by weight;
CO2is the mass percentage content of carbon dioxide;
5) during the baking process, the actual value alpha of the air coefficient is compared on line1The difference value of the air flow coefficient and the set value alpha is used for adjusting the fan frequency to enable the actual value alpha of the air coefficient1Keeping consistent with a set value alpha;
6) and finishing the oven drying process after the temperature of the coke oven reaches the required temperature.
2. The positive pressure oven process of the coke oven of claim 1, wherein the single side of step 2) is the machine side or the coke side.
3. The coke oven positive pressure drying process of claim 1, wherein the step 2) positive pressure drying equipment comprises a mechatronic gas supply device and an air supply device, and the air supply device is provided with a variable frequency fan.
4. The positive pressure oven drying process of the coke oven according to claim 1, wherein the air coefficient alpha value in different temperature ranges in the step 4) is set to be 2-40.
5. The coke oven positive pressure oven drying process of claim 1, wherein the step 5) online compares the actual value of the air coefficient alpha1The difference value between the set value alpha and the set value alpha is used for automatically adjusting the fan frequency through a PID algorithm, and when alpha is equal to alpha1When the frequency is larger than alpha, the frequency of the fan is reduced, and when the frequency is larger than alpha1When the air flow is less than alpha, the frequency of the fan is improved, so that the actual value alpha of the air coefficient1And kept in the set alpha range; the air quantity in the oven drying process is automatically adjusted, and the reasonable high-direction temperature proportion of the coke oven is ensured.
CN202011532670.XA 2020-12-23 2020-12-23 Coke oven positive pressure oven drying process Active CN112646590B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202011532670.XA CN112646590B (en) 2020-12-23 2020-12-23 Coke oven positive pressure oven drying process
PCT/CN2021/140566 WO2022135491A1 (en) 2020-12-23 2021-12-22 Positive-pressure oven baking process for coke oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011532670.XA CN112646590B (en) 2020-12-23 2020-12-23 Coke oven positive pressure oven drying process

Publications (2)

Publication Number Publication Date
CN112646590A CN112646590A (en) 2021-04-13
CN112646590B true CN112646590B (en) 2022-05-10

Family

ID=75360292

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011532670.XA Active CN112646590B (en) 2020-12-23 2020-12-23 Coke oven positive pressure oven drying process

Country Status (2)

Country Link
CN (1) CN112646590B (en)
WO (1) WO2022135491A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112646590B (en) * 2020-12-23 2022-05-10 中冶焦耐(大连)工程技术有限公司 Coke oven positive pressure oven drying process

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2970477B2 (en) * 1995-06-22 1999-11-02 住友金属工業株式会社 Control method of coke oven pressure
DE102005025955B3 (en) * 2005-06-03 2007-03-15 Uhde Gmbh Supply of combustion air for coking ovens
CN105700383B (en) * 2016-02-26 2018-05-29 中冶焦耐自动化有限公司 A kind of positive pressed baker optimal control method
CN108865185A (en) * 2018-07-05 2018-11-23 中冶焦耐(大连)工程技术有限公司 A kind of charing chamber pressure is positive the heatingup of coke oven battery technique of pressure
CN109593561B (en) * 2019-01-31 2024-05-28 中国华能集团清洁能源技术研究院有限公司 Furnace drying system and furnace drying method of water-cooled wall gasifier
CN112646590B (en) * 2020-12-23 2022-05-10 中冶焦耐(大连)工程技术有限公司 Coke oven positive pressure oven drying process

Also Published As

Publication number Publication date
WO2022135491A1 (en) 2022-06-30
CN112646590A (en) 2021-04-13

Similar Documents

Publication Publication Date Title
CN106766883B (en) Optimal combustion control system and method for regenerative heating furnace
CN112646590B (en) Coke oven positive pressure oven drying process
CN106319123B (en) A method of control coal direct combustion hot-air furnace leaving air temp
CN102686946B (en) The method regulated for the burning correcting one group of combustion chamber and the equipment implementing the method
CN105605609A (en) Thermal power plant boiler combustion oxygen amount optimizing method
CN107022359A (en) A kind of coke oven combustion chamber temperature control control nitre method and system
CN106839746A (en) A kind of bf coal injection system combustion gas furnace automatically optimizes burning stove control method
CN107091577A (en) A kind of online linear scale control combustion system and its control method
CN111651898B (en) Automatic adjustment method for oven temperature of coke oven
CN108826989B (en) Radiant tube combustion performance thermal simulation test furnace and method
CN212320445U (en) Heat recovery coke oven flue gas control system
KR20140011214A (en) Flow control apparatus and the method thereof
CN206014991U (en) A kind of combustion stablized dry-off oven device for blast furnace
CN107477570A (en) The ultralow discharged nitrous oxides process of ethane cracking furnace combustion system
CN105925276B (en) A kind of coke oven combustion chamber segmentation gas supply heating device and its method
CN112285158B (en) Device and method for testing combustion characteristics of metallurgical gas
CN205838912U (en) A kind of coke oven combustion chamber segmentation supply heater
CN108278854A (en) A kind of diesel oil furnace drying method
CN109579044B (en) Air-fuel ratio dynamic feedforward combustion control method for walking beam furnace
CN104818034B (en) Automatic adjustment method and device for controlling production of nitrogen oxide of coke oven
CN210560234U (en) Air preheating type heat recovery coke oven
CN206974215U (en) A kind of online linear scale control combustion system
CN113419025A (en) Coke oven air excess coefficient real-time monitoring device and adjusting method
CN220419257U (en) Ultralow nitrogen combustion experiment platform
JP2013096628A (en) Control method and control device for radiant tube furnace

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant